"Computational modeling and experimental study of the combustion dynamics and explosive effects of energetic, multiphase systems"

固体推进剂和爆炸物属于可燃物，称为高能材料。这些能源广泛用于安全气囊充气机、火箭和爆破等应用。由于其在实际应用中的重要性，这些含能材料的可靠模型是非常可取的。对于工程规模的系统，基于非平衡多相混合物理论的Baer-Nunziato BN模型主要被考虑用于粒状含能材料，并且其推广已被应用于非均质固体颗粒流。然而，精确求解复杂BN多相方程并执行真实的模拟的可能性长期以来一直是一个非常雄心勃勃的目标。近年来，这个多相模型经历了密集的分析发展，应用数学和科学计算的新进展打开了充满希望的机会，以达到这一目标，找到准确和有效的数值解。 提出了一个为期五年的研究计划，以开发一个计算框架，与国家的最先进的科学计算策略，模拟可压缩多相流的能量系统。这将通过计算分析来实现，以开发新的高阶数值方法，用于BN多相模型的精确解，以及适当定义的多相问题的实验，以提供验证，经验相关性和新的观察结果，用于额外的物理建模。这一技术进步将应用于凝聚炸药和固体推进剂燃烧的基础研究，以及非均质气粒系统的爆轰动力学。这项研究将提供适用于国防，航空航天，汽车和采矿业的数字技术，所有这些都对加拿大经济很重要。基础研究的结果不仅将提供信息，促进对多相燃烧和爆炸的理解，而且还将产生广泛的影响，以改善新应用的炸药的配方和特性，并建立标准，安全处理和储存军事和其他工业环境中的高能材料。

Solid propellants and explosives belong to the class of combustible known as energetic materials. These energy resources are extensively used for applications such as airbags inflators, rockets and demolitions. Because of its great importance for practical applications, a reliable model of these energetic materials is highly desirable. For engineering scale systems, the Baer-Nunziato BN model based on non-equilibrium multiphase mixture theory is mostly considered for granular energetic materials, and its generalization has been applied for heterogeneous solid-particle flows. However, the possibility to accurately solve the complex BN multiphase equations and perform real simulations has long represented a very ambitious goal. In recent years, this multiphase model has undergone intensive analytical development, and new advance in applied mathematics and scientific computing opens promising opportunity to reach this goal of finding accurately and efficiently its numerical solutions. A five year research program is proposed to develop a computational framework with state-of-the-art scientific computing strategies for simulating compressible multiphase flow of energetic systems. This will be accomplished through computational analyses to develop new high-order numerical methods for the accurate solutions of the BN multiphase model, and experiments of suitably defined multiphase problems to provide validation, empirical correlations and new observations for additional physical modeling. This technological advancement will be applied for fundamental studies of condensed explosives and solid propellants combustion, and detonation dynamics in heterogeneous gas-particle systems. This research will deliver a numerical technology applicable in defense, aerospace, automotive and mining industries, all of which are important to the Canadian economy. Results from the fundamental studies will not only provide information which advance the understanding of multiphase combustion and explosion, but will also lead to a broad impact to improve the formulation and characterization of explosives for novel applications, and to establish standards for the safe handling and storing of energetic materials in the military and other industrial settings.